<form class="layui-form" method="post">

    %input%

    <div class="layui-form-item">
        <div class="layui-input-block">
            <input type="submit" class="layui-btn" lay-submit lay-filter="formDemo">
            <button type="reset" class="layui-btn layui-btn-primary">重置</button>
        </div>
    </div>
</form>